EPG Customize

Hello! How I can customize EPG channel(or program) node element?

I tried to create few pretty simple custom ContentNodes:

Channel

<component name="EpgGridChannel" extends="ContentNode">
<children>
	<Poster
		  id="epgGridChannel"
		  uri="pkg:/images/channel.png"
		  width="14"
		  height="10"
		  translation="[10,10]" 
		  opacity="1"/>
</children>
</component>

Program

<component name="EpgGridProgram" extends="ContentNode">
<children>
	<Poster
		  id="epgGridProgram"
		  uri="pkg:/images/program.png"
		  width="14"
		  height="10"
		  translation="[10,10]" 
		  opacity="1"/>
</children>
</component>

In next time, I fill the EPG:

... 

sub FillEpgGrid()

   m.content = createObject("RoSGNode","ContentNode")
   m.top.setFocus(true)
         
   for i = 0 TO m.temp.chns.Count() - 1 STEP 1
   
   addChannel(i)
   addPrograms(i)
   
   NEXT i
           
   m.top.content = m.content
   ' ... EPG view Customization Code ...

end sub
...

And now starts the most intresting things... As i suppose, all what i need is append my custom nodes instead of default, like this:

Default

sub addChannel(index as integer)

  channel = m.temp.chns[index]
  m.channel = m.content.createChild("ContentNode")
  m.channel.TITLE = channel.name

end sub

Custom

sub addChannel(index as integer)

  channel = m.temp.chns[index]
  m.channel = m.content.createChild("EpgGridChannel")
  m.channel.TITLE = channel.name  

end sub

I expect that my posters will be inserted into default epg grid, but when i apply content to EPG:

... ' foreach code

 m.top.content = m.content

...

a) when i try to customize channels - roku device goes to restart.
b) when i try to customize programs - nothing happens (roku didn't restarted and posters didn't inserted).
How I can customize EPG element?